This is from the APA official Team Manual and what it says under "Equipment" - I hope this helps
"EQUIPMENT
In general, any piece of equipment designed specifically for pocket billiards,
with the exception of jump cues and laser devices, is acceptable in APA
League play. Special equipment, such as bridges and cue extenders, are legal. Jump shots are legal, when executed properly (see JUMP SHOTS described in Definitions), but such shots must be attempted using your regular game cue (see REGULAR GAME CUE described in Definitions). Those cues especially designed for jump shots MAY NOT be used in competition.
Players are not allowed to break their cues down to attempt jump shots.
*Any piece of equipment not covered by this rule and in question will be ruled upon by APA. Cues with moveable parts will generally NOT be allowed."
I think the cue they guy used was fine under this rule